<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>练习5：DOM操作</title>
		<style type="text/css">
			html,div,ul,li {margin: 0px;padding: 0px;}
			a{cursor: pointer;}
			li {list-style: none;cursor: pointer;}
			fieldset {border: #000 1px dashed;width: 225px;height: 225px;padding: 10px;text-align: center;float: left;margin-left: 5px;}
			#cont_left {width: 300px;height: 500px;float: left;}
			#cont_right {float: left;}
			.newcss1{background-color: yellowgreen;}
		</style>
	</head>
	<body>
		<div id="cont_left">
			<ul><img src="img/fold.gif"><a onclick="show('menu1')"> 通过DOM获取信息 </a>
				<ul id="menu1">
					<li onclick="showImg()"><img src="img5/doc.gif">获取原始图片路径</li>
					<li onclick="getFruit()"><img src="img5/doc.gif">获取我喜欢的水果</li>
				</ul>
			</ul>

			<ul><img src="img/fold.gif"><a onclick="show('menu2')"> 通过DOM操作元素 </a>
				<ul id="menu2">
					<li onclick="createImg()"><img src="img5/doc.gif">创建图片</li>
					<li onclick="cloneImg()"><img src="img5/doc.gif">克隆图片</li>
					<li onclick="changeImg()"><img src="img5/doc.gif">改变图片</li>
					<li onclick="removeImg()"><img src="img5/doc.gif">删除图片</li>
				</ul>
			</ul>

			<ul><img src="img/fold.gif"><a onclick="show('menu3')"> 通过DOM操作样式 </a>
				<ul id="menu3">
					<li onclick="changeCss1()"><img src="img5/doc.gif">为原始图片加上行间样式</li>
					<li onclick="changeCss2()"><img src="img5/doc.gif">为所有的fieldset加上内部样式</li>
				</ul>
			</ul>

		</div>
		<fieldset>
			<legend>原始图片</legend>
			<img id="fruit" src="img5/fruit.jpg">
		</fieldset>
		<fieldset>
			<legend>图片路径</legend>
			<p id="msg1">在这里显示</p>
		</fieldset>
		<fieldset>
			<legend>选择你喜欢的水果</legend>
			<ul style="text-align: left;">
				<li>
					<input name="enjoy" type="checkbox" value="苹果" />苹果
				</li>
				<li>
					<input name="enjoy" type="checkbox" value="香蕉" checked="checked" />香蕉
				</li>
				<li>
					<input name="enjoy" type="checkbox" value="葡萄" />葡萄
				</li>
				<li>
					<input name="enjoy" type="checkbox" value="梨" checked="checked" />梨
				</li>
				<li>
					<input name="enjoy" type="checkbox" value="西瓜" />西瓜
				</li>
			</ul>
			<div id="msg2" style="margin-top: 10px;text-align: left;"></div>
		</fieldset>
		<fieldset>
			<legend>创建图片</legend>
			<div id="msg3"></div>
		</fieldset>
		<fieldset>
			<legend>克隆图片</legend>
			<div id="msg4"></div>
		</fieldset>
		<script>
			//唐杰 179000950
			//菜单收缩与扩展
			function show(title) {
				let currentMenu = document.getElementById(title);
				let currentStatus = currentMenu.style.display;
				currentMenu.style.display = currentStatus == "" ? "none" : "";
			}
			//获取原始图片路径
			function showImg() {
				let a1 = document.getElementById("fruit");
				let a2 = document.getElementById("msg1");
				a2.innerHTML = a1.getAttribute("src");
			}
			//获取喜欢的水果
			function getFruit() {
				  let html = "你喜欢的水果是: ";
				  let enjoy = document.querySelectorAll("input[name='enjoy']");
							for(let i = 0;i<enjoy.length;i++){
							        enjoy[i].checked ? html +=enjoy[i].value + " ":html += "";
							    }
							   
				document.querySelector("div#msg2").innerHTML = html;
			}
			// 唐杰 179000950
			//创建图片
			function createImg() {
				 let img = document.createElement("img");
				 img.setAttribute("src","img5/grape.jpg");
							
				document.querySelector("div#msg3").appendChild(img);
			}
			//克隆图片
			function cloneImg() {
				document.querySelector("#msg4").appendChild(document.querySelector("#fruit").cloneNode(true));
			}
			//改变图片
			function changeImg() {
				 document.querySelector("#fruit").setAttribute("src","img5/grape.jpg");
			}
			//删除图片
			function removeImg() {
				document.querySelector("#fruit").parentNode.removeChild(document.querySelector("#fruit"));//删除当前节点
			}
			//操作样式1
			function changeCss1(){
				let fruit = document.querySelector("#fruit");
					fruit.style.border = "red 3px solid";//设置边框
				    fruit.style.borderRadius= "10px";//设置圆角
			}
			//操作样式2
			function changeCss2(){
				$("fieldset").attr("class","newcss1");
			}
		</script>
	</body>
</html>
